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LMC6681 Datasheet(PDF) 2 Page - Texas Instruments

Part # LMC6681
Description  Single/LMC6682 Dual/LMC6684 Quad Low Voltage, Rail-To-Rail Input
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LMC6681 Datasheet(HTML) 2 Page - Texas Instruments

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LMC6681 Single/LMC6682 Dual/LMC6684 Quad
Low Voltage, Rail-To-Rail Input and Output CMOS
Amplifier with Powerdown
General Description
The LMC6681/2/4 is a high performance operational ampli-
fier which can operate over a wide range of supply voltages,
with guaranteed specifications at 1.8V, 2.2V, 3V, 5V, and
10V.
The LMC6681/2/4 provides an input common-mode voltage
range that exceeds both supplies. The rail-to-rail output
swing of the amplifier assures maximum dynamic signal
range. This rail-to-rail performance of the amplifier, com-
bined with its high open-loop voltage gain makes it unique
among CMOS rail-to-rail amplifiers. The LMC6681/2/4 is an
excellent choice for circuits where the common-mode volt-
age range is a concern.
The LMC6681/2/4 has a powerdown mode which can be
controlled externally. In this powerdown mode, the supply
current decreases from 700 µA per amplifier to less than 1
µA per amplifier. The LMC6684 has two powerdown options.
Each of the powerdown pins disables two amplifiers.
The LMC6681/2/4 has been designed specifically to improve
system performance in low voltage applications. The ampli-
fier’s 80 fA input current, 0.5 mV offset voltage, and 82 dB
CMRR maintain accuracy in battery-powered systems.
Features
(Typical unless otherwise noted)
n Guaranteed Specs at 1.8V, 2.2V, 3V, 5V, 10V
n Rail-to-Rail Input Common-Mode Voltage Range
n Rail-to-Rail Output Swing
(within 10 mV of supply rail, @ V
S=3V and RL=10 kΩ)
n Powerdown Mode
I
S OFF ≤ 1.5 µA/Amplifier
(Guaranteed at V
S = 1.8V, 2.2V, 3V, and 5V)
n Ultra Low Input Current
80 fA
n High Voltage Gain (VS = 3V, RL = 10 kΩ):
120 dB
n Unity Gain Bandwidth
1.2 MHz
Applications
n Battery Operated Circuits
n Sensor Amplifiers
n Portable Communication Devices
n Medical Instrumentation
n Battery Monitoring Circuits
n Level Detectors, Sample-and-Hold Circuits
Connection Diagrams
8-Pin DIP/SO
DS012042-1
Top View
14-Pin DIP/SO
DS012042-2
Top View
16-Pin DIP/SO
DS012042-3
Top View
May 1995
© 1999 National Semiconductor Corporation
DS012042
www.national.com


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